If you are a chef, no matter how good a chef you are, it’s not good cooking for yourself; the joy is in cooking for others – it’s the same with music. will.i.am
William Adams (born March 15, 1975), known professionally as will.i.am (pronounced ‘Will-I-am’), is an American rapper, singer, songwriter, record producer, DJ and actor. He is best known as a founding and lead member of the hip hop group The Black Eyed Peas.
I would say this is the same for any creative endeavor.